Metal-cutting saw.



No. 896,401. PATENTED AUG. 18, 1908. W. LEWIS.

METAL OUTTINGSAW.

APPLICATION FILED JAN. 26, 1906.

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UITE STES AE WILFRED- LEWIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TOTHE TABOR MANU- FACTURING COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATIONOF NEW JERSEY.

METAL-CUTTING SAW.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed January 26, 1906. Serial No. 297,923.

with saw teeth is secured to and actuated by a rotating spindlesupported in proper bearings on a housing, which housing, by

preference, isone having capacity for a reciprocating movement on aspindle slideway.

In another application for Letters Patent filed by me November 17th,1905, Serial No. 287,779, I have shown and described the use ofresilient means acting to hold the spindle and the housing when amovable housing is used in contacting positions upon their bearingswhich correspond with those occupied when the saw is at work.

My present invention is for special appliances for accomplishing thissame purpose, said appliances being more particularly, devised andadapted for use in connection with machines not originally equipped withbreaking mechanism of the kind shown and described in my formerapplication.

The nature of my improvements will be best understood as described inconnection with the drawings in which they are illustrated and in whichFigure 1, is a side elevation of a saw equipped with my new mechanism inwhat I believe-to be its most convenient form. Fig. 2, is a plan view ofthe saw shown in Fig. 1, and Figs. 3 and 4, are elevations of modifiedconstructions of my appliance.

A, indicates the guideway or shears, the guideways proper beingindicated at A, A.

B, is a feed screw by means of which the housing is moved backward andforward on the guideway in the usual way.

C, is the housing supported on the guideway and secured in positionthereon by flanges C, C. As shown in Figs. 1 and 2,

- the housing is provided with projecting flanges C C in front.

D, is the saw supporting and actuating spindle secured in properhearings on the housing and, as shown, provided with collars or abutmentplates D, D between which the saw E, is secured, F, indicating the gearwheel on the spindle by which it is rotated through the proper drivingmechanism not shown.

G, is a beam resting on the slide in front of the housing and secured tomove with the housing in any convenient way, as for instance by means ofpins G, extending through the lugs C into the beam G.

H, is a beam loosely secured to the housing at I, and having aprojecting end H, which is pressed upward by resilient means, as shownby spring J, resting on a plate K,

secured to the bottom of the housing, which the rear end of the leverresting on the spring supported beam H, at its projecting end H,

while an intermediate portion L of the beam is conformed to and pressedagainst the spindle or spindle collar B.

It will readily be seen that the action of the spring actuated brakelever is to press the spindle B, against its bearings in the housing inthe same direction in which it is pressed by the resistance of the workwhen the saw is in use, and it will also be seen that the front end ofthe housing is also drawn upward by the action of the brake lever untilit'is brought and maintained in permanent contact with the slideway,just as is the case when the saw is at work. i

In Fig. 3, I have indicated a modification of my device, in which abrake lever L is fulcrumed on a projection M,'of the housing and drawnupward against the spindle by the action of a weight 0, connected to thebrake lever by a cord running over a pulley N. In Fig. 4, the brakelever here indicated at L, is fulcrumed on the housing at M, and pressedagainst the spindle in the proper direction by a counter weight P. p

In all the plans indicated it will be seen that the brake lever liesbetween the saw and the adjacent side of the guideway, and this is themost convenient place for its application where the construction of themachine is such as to permit it.

Having now described my invention, what I claim as new and desire tosecure byLetters Patent is:

1. In a machine for sawing metals in combination; a housing, a sawspindle supported therein, and a brake for the saw consisting of a leverhaving a fulcrum occupying a fixed position with reference to thehousing, and 5 resting against the saw spindle on the side opposite tothat which is pressed against the bearing when the saw is in use andresilient means acting on the lever to press it against the s indle.

n a machine for sawing metals in combination a housing slidinglysupported on a guideway, a saw spindle supported therein, and a brakefor the saw consisting of a lever having a fulcrum occupying a fixedposition with reference to the housing, and resting against the sawspindle 0n the side opposite to that which is pressedagainst the bearingwhen the saw is in use and resilient means acting on the lever to pressit against the spindle and to hold the housing permanently in therelative position on the guideway which it occupies when the saw is inuse.

3. A machine for sawing metals having in combination a guideway, ahousing slidingly supported thereon, a saw spindle supported in thehousing and carrying a saw on its end, a brake lever contacting with thespindle between the saw and the spindle housing and resilient means forpressing the lever against the spindle to hold the spindle and housingin the same relative positions they occupy when the saw is at Work.

4. A machine for sawing metals having in combination a guideway, ahousing slidingly supported thereon, a saw spindle supported in thehousing and carrying a saw on its end, a fulcrum block supported on theguideway in front of the housing connections for'moving the fulcrumblock with the housing, abrake lever engaging with the fulcrum block andwith the spindle between the saw and the spindle housing andresilientmeans for turning the lever relative to the fulcrum block topress the lever against the spindle to hold the spindle and housing inthe same relative positions they occupy when the saw is at work.

WILFRED LEWIS.

Witnesses:

ARNOLD KATZ, D. STEWART.

